chore(deps): update dependency autoprefixer to v8.6.5

This MR contains the following updates:

Package	Type	Update	Change
autoprefixer	devDependencies	minor	8.5.0 -> 8.6.5

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Release Notes

postcss/autoprefixer

v8.6.5

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• Do not show Grid warnings if IE was not selected.

v8.6.4

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• Fix stretch prefix in Chrome >= 46.

v8.6.3

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• Add warnings for unsupported Grid features.
• Add warnings about wrong Grid properties.
• Add note about grid option for grid properties in autoprefixer --info.

v8.6.2

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• Fix error during adding Grid prefixes in @media (by Evgeny Petukhov).

v8.6.1

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• Fix grid-template with media queries (by Evgeny Petukhov).

v8.6.0

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Autoprefixer 8.6 brings gap property support and two values support for grid-gap/gap.

Grid Gap

CSSWG renamed grid-gap property to gap.

@​yepninja added gap support with 2 values support.

Grid layout code bellow will work even in IE if you pass grid: true option to Autoprefixer:

.main {
    gap: 10px 20px;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-areas: "head head head"
                         "nav main main"
                         "nav foot foot";
}

Other Changes

• Add ignoreUnknownVersions option for Browserslist

v8.5.2

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• Fix grid-template support wit auto row sizes (by Yury Timofeev).

v8.5.1

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• Remove unnecessary warning on -webkit-fill-available.

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